- Efficiency of 22.5% matches the TOPCon 550-600W median
- Power density of 224.5 W/m² matches the TOPCon 550-600W median
- Temperature coefficient of -0.29%/°C matches the TOPCon 550-600W median
- Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
- In the top 29% for efficiency among all TOPCon panels
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Series JAM66D42 MB 6 variants
JA Solar JAM66D42 MB series modules are designed for installations where high energy yield from the same surface area and stable performance over years are crucial – especially for commercial rooftops and utility-scale PV farms. These modules feature N-type TOPCon cells, which maintain their parameters better in the long term and are less susceptible to typical operational losses, effectively mitigating the risk of disappointment with production after several seasons. The double glass construction enhances resistance to environmental conditions and improves laminate durability, which is vital for projects with a long payback period. Thanks to bifacial technology, the module can utilize reflected light from the ground, boosting energy yield where every percentage point counts. The semi-lattice design supports better tolerance to partial shading and minimizes connection losses, while the refined cell architecture aids performance under lower irradiance. This is an excellent choice for investors, EPC contractors, and companies optimizing LCOE who seek advantages over standard P-type PERC modules.
Electrical Parameters (STC)
| Nominal Power (Pmax) | 580 Wp |
| Module Efficiency | 22.50% |
| Voltage at Max Power (Vmpp) | 40.42 V |
| Current at Max Power (Impp) | 14.35 A |
| Open Circuit Voltage (Voc) | 48.18 V |
| Short Circuit Current (Isc) | 15.21 A |
| Max System Voltage | 1500 V |
Temperature Coefficients
| Temp. Coeff. Pmax | -0.290%/°C |
| Temp. Coeff. Voc | -0.250%/°C |
| Temp. Coeff. Isc | 0.045%/°C |
| NOCT | 45°C |
Cell Technology
| Cell Type | Monocrystalline |
| Cell Count | 132 |
| Bifacial | Yes |
| Bifaciality Factor | 80% |
Dimensions & Weight
| Length | 2278 mm |
| Width | 1134 mm |
| Height | 30 mm |
| Weight | 31.8 kg |
| Area | 2.58 m² |
| Power Density | 224.5 Wp/m² |
Warranty
| Product Warranty | 12 years |
| Performance Warranty | 30 years |
| End-of-Warranty Output | 87.4% |
| First Year Degradation | 1.00% |
| Annual Degradation | 0.40%/year |